JP7407376B2 - Track circuit transceiver and track circuit receiver - Google Patents

Description

The present invention relates to a transmitter/receiver that is connected to a rail and forms a track circuit (track circuit transmitter/receiver), and also relates to a receiver (track circuit receiver) in which a receiving portion of the transmitter/receiver is specified.
Specifically, in addition to providing standard functions such as train detection functions, track circuit transceivers and track circuits that can also detect dielectric breakdown conditions related to the boundary portions (rail insulation) of insulated track circuits. Regarding the receiver.
Furthermore, the present invention also relates to a track circuit transmitter/receiver and a track circuit receiver that can be applied to single-track sections where the operating direction changes depending on the train operating conditions, unlike double-track sections where the operating direction is fixed for each line.

Track circuits that detect the presence of trains on the track (see, for example, Non-Patent Document 1) are used to control signal lamps, but the number of display signals is increasing in order to improve train density and operation speed. In this case, when controlling the three indications of R, Y, and G, by using a binary and three-position track circuit that can take three-value states, it is possible to It has become possible to control signal lamps without acquiring information on track circuits located in the opposite direction (in the opposite direction) through a separate communication line (for example, see Non-Patent Document 2). On the other hand, as the number of indications increases, such as 4 indications, 5 indications, and 6 indications, the control of such multi-indication colored light signals requires information transmission even with binary and 3-position track circuits. Due to the lack of capacity, communication cables have been installed at considerable cost in order to obtain information on the forward track circuit (the track circuit in the direction of train travel) via a separate line.

In addition, many track circuits that detect the presence of trains are insulated track circuits in which insulating pads are inserted into the rails at the boundaries of the track circuits to divide them into numerous track circuit sections; In the case of a circuit, if the insulation pad is damaged or the insulation is deteriorated by iron powder, resulting in complete or more than a certain degree of insulation breakdown, the signal current of the adjacent track circuit will wrap around, making it difficult to accurately Train detection becomes impossible. As described above, breakdown of rail insulation is linked to operational disturbances, and detection thereof is desired.

As a countermeasure against this, several inventions have been made, such as adding information to the transmitted track circuit signal. For example, there are those that detect dielectric breakdown by using multiple carrier waves with different frequencies and train detection signals (for example, see Patent Documents 1 and 2), and track circuit signals that include a track circuit identification number that identifies the destination track circuit. There are known methods that detect dielectric breakdown by using (for example, see Patent Document 3), and methods that detect dielectric breakdown by using a track circuit signal that includes line number information for a track circuit including a turnout (see, for example, Patent Document 3). For example, see Patent Document 4).

Japanese Patent Application Publication No. 58-66370 Japanese Patent Application Publication No. 9-2270 Japanese Patent Application Publication No. 2001-213314 Japanese Patent Application Publication No. 2005-145089 Japanese Patent Application Publication No. 10-157622

Japan Railway Electrical Engineers Association, “Introduction to Signals for Railway Electrical Engineers: Track Circuits,” revised 2nd edition published, May 20, 2005, p. 3-5 Japan Railway Electrical Engineers Association, “Introduction to Signals for Railway Electrical Engineers: Track Circuits,” revised 2nd edition published, May 20, 2005, p. 64

Regarding the control of the multi-display color light signal mentioned above, by following the method of adding information to the track circuit signal and making specific modifications, it is possible to control the multi-display color light signal without installing a separate line. The above signal lamp device can be controlled. For example, a series of track circuits is configured to transmit track circuit signals containing information corresponding to the order counted from the track circuit on which the train is located, and then the processing section of each track circuit transmits the received track circuit signals. Obtain the order information of the own track circuit by calculating +1 from the order information, perform a lamp control output of the signal display corresponding to the order information, and transmit the order information to the subsequent track circuit. By making such a relatively simple modification, signal lamps with four or more indications can be appropriately controlled without the need for separate lines.

However, when it comes to detecting dielectric breakdown in insulated track circuits, adding information such as the frequency and code for identifying the track circuit to the track circuit signal not only complicates the transmitter but also makes it difficult to detect dielectric breakdown. The receiving section for this purpose also becomes complicated. Specifically, increasing the number of frequencies (for example, see Patent Documents 1 and 2) involves adding bandpass filters. In addition, when adding specific information (for example, see Patent Documents 3 and 4), means for extracting specific information and determining means depending on whether extraction is possible or not are installed, but Since there is no regulation regarding the transmission/reception timing of track circuit signals related to the circuit, the mode of interference is complicated, and the specific information extraction means and discrimination means also tend to become more complicated as the detection accuracy increases.

In particular, when track circuit signals are used to transmit not only fixed information such as track circuit identification numbers and line number information, but also variable information such as train position information and multi-display information for color light signal control. (See, for example, Patent Document 5), which leads to further complication of the transmitter/receiver for the track circuit.
Therefore, the first technical challenge is to realize track circuit equipment that can accurately detect dielectric breakdown of the track circuit in addition to data transmission of variable content information by transmitting and receiving track circuit signals, with as simple a configuration as possible.

In addition, in single-track automatic block method A, which allows track circuits between stations on single-track sections to allow multiple trains to enter, it is necessary to switch the transmission and reception of track circuit signals depending on the driving direction. Although a control line called a directional line was required, there is also a system that eliminates the need for a single directional line by transmitting data of multi-display information using track circuit signals (for example, see Patent Document 5). In addition to requiring multiple frequencies and multiple receivers, it is applicable to uninsulated track circuits and is not applicable to insulated track circuits.
Therefore, the second technical problem is to make it applicable to insulated track circuits installed in single-track line sections that require switching of the driving direction.

The track circuit transmitter/receiver of the present invention (solution means 1) is invented in order to solve the above-mentioned first technical problem,
a receiving section connected to a portion of the first track circuit section closer to the track circuit boundary when the first track circuit section, the track circuit boundary, and the second track circuit section are connected to an insulated track circuit; A track circuit transceiver comprising: a transmitter connected to a portion of the second track circuit section near the track circuit boundary when installed on the insulated track circuit ;
Cross-border transmission means capable of transmitting information from the reception section to the transmission section is provided, and when the reception section receives the first track circuit signal from the first track circuit section, the transmission section transmits the information via the cross-border transmission means. The transmission section is configured to transmit information based on the first track circuit signal to the section, and the transmission section transmits a second track circuit signal to the second track circuit section in accordance with the transmitted information. , a predetermined time difference is ensured between the transmission time of the first track circuit signal and the transmission time of the second track circuit signal, and the first track circuit signal is transmitted either during or after the transmission time. Alternatively, assuming that a no-signal period in which no signal is transmitted is ensured on both sides, determining means is provided for determining the dielectric breakdown state of the track circuit boundary based on the receiving state of the first track circuit signal during the no-signal period. It is characterized by

Moreover, the track circuit receiver of the present invention (solution means 2) is one in which a receiving section and a determining means that greatly contribute to solving the first technical problem are extracted and specified from the above track circuit transceiver,
In a track circuit receiver that is connected to a portion of the first track circuit section closer to the track circuit boundary when installed on an insulated track circuit in which a first track circuit section, a track circuit boundary, and a second track circuit section are connected,
When the first track circuit signal is received from the first track circuit section, the information is transmitted to a transmitting section connected to a portion of the second track circuit section near the track circuit boundary when installed on the insulated track circuit. Information based on the first track circuit signal is transmitted to the transmitting unit via the cross-border transmission means, and there is a no-signal period in which no signal is sent either during or after the first track circuit signal. The dielectric breakdown state of the track circuit boundary is determined based on the receiving state of the first track circuit signal during the no-signal period, assuming that the above-mentioned signal-free period is ensured.

Furthermore, the track circuit transmitter/receiver of the present invention (solution means 3) is the track circuit transmitter/receiver of the above solution means 1,
The transmitter is characterized in that the transmitter secures a no-signal period in which no signal is transmitted during or after the second track circuit signal.

Further, the track circuit transmitter/receiver of the present invention (solution means 4) is the track circuit transmitter/receiver of the above solution means 1 and 3,
When the determining means detects the cycle start waveform during the no-signal period, assuming that the first track circuit signal includes a cycle start waveform that can identify the start of transmission of the first track circuit signal. It is characterized in that it is determined that dielectric breakdown has occurred.

Furthermore, the track circuit transmitter/receiver of the present invention (solution means 5) is obtained by deleting the requirement of securing a no-signal period from the track circuit transmitter/receiver of the above-mentioned solution means 4 and adding an alternative requirement,
a receiving section connected to a portion of the first track circuit section closer to the track circuit boundary when the first track circuit section, the track circuit boundary, and the second track circuit section are connected to an insulated track circuit; A track circuit transceiver comprising: a transmitter connected to a portion of the second track circuit section near the track circuit boundary when installed on the insulated track circuit;
Cross-border transmission means capable of transmitting information from the reception section to the transmission section is provided, and when the reception section receives the first track circuit signal from the first track circuit section, the transmission section transmits the information via the cross-border transmission means. The transmission section is configured to transmit information based on the first track circuit signal to the section, and the transmission section transmits a second track circuit signal to the second track circuit section in accordance with the transmitted information. , both the first track circuit signal and the second track circuit signal include a cycle start waveform that can specify the start of transmission, and the transmission timing of the first track circuit signal and the second track circuit signal are A predetermined time difference is ensured between the transmission timing of the circuit signal, and if the second track circuit signal is superimposed on the first track circuit signal with a shift of the time difference, the cycle start waveforms of both signals are destroyed. A determining means is provided for determining that dielectric breakdown has occurred when a plurality of the period start waveforms are detected in the first track circuit signal as a signal that continues to remain without any damage. Features.

Further, the track circuit transmitter/receiver of the present invention (solution means 6) is the track circuit transmitter/receiver of the above solution means 1 and 3,
The determining means is configured to determine that dielectric breakdown has occurred when a signal exceeding a no signal is detected during the no signal period regarding the receiving state of the first track circuit signal. do.

Further, the track circuit transmitter/receiver of the present invention (solution means 7) is the track circuit transmitter/receiver of the above-mentioned solution means 4 to 6,
When the receiving section receives the first track circuit signal following the first track circuit signal after the determining means determines that dielectric breakdown has occurred, the transmitting section receives the first track circuit signal next to the second track circuit signal. The determination means is configured to refrain from transmitting the second track circuit signal, and if no dielectric breakdown is detected for the next first track circuit signal, the determining means determines that dielectric breakdown has occurred. shall be.

Further, the track circuit transceiver of the present invention (solution means 8) is the track circuit transceiver of the above-mentioned solution means 1, 3, 4, 6, and 7,
The no-signal period is secured in the middle of the first track circuit signal, the time difference is shorter than the time length of the no-signal period, and the time is from the start of the first track circuit signal to the start of the no-signal period. It is characterized by being longer.

Further, the track circuit transmitter/receiver of the present invention (solution means 9) is the track circuit transmitter/receiver of the above solution means 8,
Regarding the first track circuit signal and the second track circuit signal delayed by the time difference, a false logical value is assigned to a portion of the no-signal period, and a true logical value is assigned to a portion of the other period. It is characterized in that, when a logical product is taken for each corresponding time period, a relationship is established in which the logical value is false at all times.

Further, the track circuit transmitter/receiver of the present invention (solution means 10) is the track circuit transmitter/receiver of the above solution means 1, 3 to 9,
The apparatus is characterized in that a connection destination exchanging means for exchanging a connection destination of the receiving section and a connection destination of the transmitting section is provided.

Further, the track circuit transmitter/receiver of the present invention (solution means 11) is the track circuit transmitter/receiver of the above solution means 10,
It is characterized in that when the receiving section receives the first track circuit signal including an instruction to operate the connection destination exchange means, the connection destination exchange means is activated in response.

Further, the track circuit transmitter/receiver of the present invention (solution means 12) is the track circuit transmitter/receiver of the above solution means 11,
It is characterized in that the connection destination exchange means delays the connection destination exchange according to the operation instruction from the time when the reception section receives the operation instruction until the transmission by the transmission section is completed.

In the track circuit transmitter/receiver (solution means 1) and track circuit receiver (solution means 2) of the present invention, by providing cross-border transmission means etc., the first track circuit received from the first track circuit section Since it becomes possible to create a second track circuit signal based on the track circuit signal and transmit it to the adjacent second track circuit section, information transmission of track circuits that was limited to each track circuit section is now possible. The functionality is extended to span a series of track circuit sections.
Moreover, it is not limited to simple transmission of the same content, but it is also possible to modify the transmission content when crossing borders, so the information transmission function can be qualitatively enhanced. Furthermore, it becomes possible to synchronize the receiving section (first receiving section) and the transmitting section (second transmitting section).

Then, by using the synchronization function, a predetermined time difference is secured between the transmission timing of the first track circuit signal and the transmission timing of the second track circuit signal, and the other track circuit transmitter (first transmitter) Assuming that a no-signal period is ensured for the first track circuit signal transmitted to the first track circuit section, the dielectric breakdown state of the track circuit boundary is determined based on the receiving state of the first track circuit signal during the no-signal period. By making this distinction possible, even if the amount of leakage current from the second track circuit signal mixed into the first track circuit signal due to dielectric breakdown at the track circuit boundary is small, the detection method is simple. Even if the current is low, it is possible to accurately detect undesired signal contamination due to leakage current.

Note that the predetermined time difference is such that the signal period (signal transmission period) of the second track circuit signal overlaps with part or all of the no-signal period of the first track circuit signal. If the value is reflected in the operation of the receiving section through data settings, etc., it is sufficient to realize the receiving section, so both the receiving section and the transmitting section can be realized with simple configurations and means. can.
Therefore, according to the present invention, it is possible to realize track circuit equipment with a fairly simple configuration that can accurately detect dielectric breakdown of the track circuit in addition to data transmission of variable content information by sending and receiving track circuit signals. , the first technical problem is solved.

Moreover, in the track circuit transmitter/receiver of the present invention (solution means 3), a signal-free period is ensured not only for the first track circuit signal to be received but also for the second track circuit signal to be transmitted. By doing so, it is possible to contribute to accurate detection of dielectric breakdown while following a simple configuration even in the detection of dielectric breakdown related to the track circuit boundary between the second track circuit and the track circuit beyond it (third track circuit). can.

Furthermore, in the track circuit transmitter/receiver of the present invention (solution means 4), it is determined that dielectric breakdown has occurred when the period start waveform is detected during a no-signal period. When information transmission includes multiple cycle start waveforms that should only be included, it is assumed that the second track circuit signal wraps around the first track circuit signal due to dielectric breakdown. , dielectric breakdown can be detected with high accuracy.

Furthermore, in the track circuit transmitter/receiver of the present invention (solution 5), when the second track circuit signal is superimposed on the first track circuit signal with a shift of the time difference, the cycle start waveforms of both signals are destroyed. By introducing the condition that the signal continues to exist without a signal, there is no longer a requirement to ensure a signal-free period.

Furthermore, in the track circuit transmitter/receiver of the present invention (solution 6), it is determined that insulation breakdown has occurred when a signal exceeding no signal is detected during a no signal period. Since dielectric breakdown can be detected even in situations where the degree of breakdown is small, it is useful for early detection and predictive detection of dielectric breakdown.

In addition, in the track circuit transmitter/receiver of the present invention (solution means 7), a situation where it is determined that the second track circuit signal leaks to the first track circuit section due to dielectric breakdown and is mixed with the first track circuit signal. In the next step, we refrained from transmitting the second track circuit signal, which is considered to be the main cause of the leakage, and then checked for the presence of contamination, and furthermore, the presence of dielectric breakdown, thereby eliminating contamination and leakage transmission. Since whether or not there is a relationship can be ascertained from the perspective of phenomena, the accuracy of detecting dielectric breakdown is improved, so it is possible to accurately identify a state in which there is a high possibility of dielectric breakdown and make an accurate judgment.

Further, in the track circuit transmitter/receiver of the present invention (solution means 8), by ensuring a no-signal period in the middle of the first track circuit signal, a predetermined time difference is maintained between the first track circuit signal and the first track circuit signal. Since it can be made shorter than the total length, the delay time related to information transmission from the first track circuit section to the second track circuit section is shortened, and a decrease in the transmission speed related to the information transfer function is suppressed. Furthermore, by making the predetermined time difference longer than the time from the start of the first track circuit signal to the start of the no-signal period and shorter than the time from the start of the first track circuit signal to the end of the no-signal period, Since at least part of the no-signal period of the first track circuit signal overlaps with the signal period of the second track circuit signal, even if the no-signal period is inserted in the middle of the first track circuit signal, the configuration will become complicated. It is possible to accurately detect the mixing of the second track circuit signal into the first track circuit signal without any interference.

Furthermore, in the track circuit transmitter/receiver of the present invention (solution 9), the logical product of the first track circuit signal and the second track circuit signal reflecting the time difference is made to be false throughout the entire time. As a result, for any signal part of both signals, the signal part of one signal period corresponds to the other signal non-signal period, so dielectric breakdown occurs at the track circuit boundary and the second track circuit signal Even when the signal enters the first track circuit section and mixes with the first track circuit signal, the transmission information contained in the first track circuit signal is placed in the non-signal period of the second track circuit signal, and the Since it is not affected by two-track circuit signal contamination, the above transmission information can be extracted accurately even with simple processing such as ignoring information during no-signal periods, so it is possible to extract the above transmission information accurately, not only when the degree of dielectric breakdown is small but also when it is large. The information transmission function can be maintained even when

In addition, in the track circuit transmitter/receiver of the present invention (solution 10), when the receiving section is involved in lighting control of a traffic signal, the transmitting section and the receiving section that perform the information transmission function are connected to the track circuit section. In order to do this, the transmitting section is connected to the train approach side, and the receiving section is connected to the train advancing side, but by making the connection points between the receiving section and the transmitting section interchangeable, it is possible to change the transmission direction of the track circuit signal. Since reversal is possible, a single set of track circuit transceivers can be used even for track circuit sections in single-track operation where changes in the direction of train travel occur.
Therefore, according to the present invention, it can be applied to an insulated track circuit installed in a single-track line section that requires switching of the driving direction, and the second technical problem is solved in addition to the first technical problem.

In addition, in the track circuit transmitter/receiver of the present invention (solution 11), the information transmission function of the track circuit can be used to operate the connected exchange means, so there is no need to add hardware. Even if there is a problem, it is minor, so it can be easily applied to lines with single-track operation.
In particular, the track circuit transmitter/receiver that cites solution 9 has an excellent ability to maintain the information transmission function, so even if the information transmission function is used, it is possible to accurately prevent a decrease in the operating rate.

Furthermore, in the track circuit transceiver of the present invention (solution 12), connection destination exchange is performed not only for the preceding reception but also for the subsequent transmission only after the transmission is completed. Accordingly, accurate connection destination exchange can be performed not only for the first track circuit section but also for the second track circuit section without impairing information transmission.

Regarding Example 1 of the present invention, the structure of a track circuit transmitter/receiver and a track circuit receiver is shown, and (a) relates to a series of track circuits configured by attaching a track circuit transmitter/receiver to each track circuit section of the rail. Block diagram (b) is a block diagram of one of the track circuit transceivers. It is a waveform example of each track circuit signal. It is a time chart showing the signal transmission state in a series of track circuits. Both (a) and (b) are waveform diagrams reflecting the presence or absence of dielectric breakdown. It is a waveform example of each track circuit signal about Example 2 of this invention. It is a time chart showing the signal transmission state in a series of track circuits. (a) is an example of a signal waveform transmitted to the preceding track circuit section among the adjacent track circuit sections, and (b) is an example of the signal waveform transmitted to the subsequent track circuit section among the adjacent track circuit sections. (c) is an example of a signal waveform received in the above-mentioned former track circuit section. Regarding Example 3 of the present invention, an example of a signal waveform that is less affected by dielectric breakdown is expressed as a logical value. Regarding Example 4 of the present invention, the structure of a track circuit transmitter/receiver and a track circuit receiver suitable for a single track is shown, and (a) is constructed by attaching a track circuit transmitter/receiver to each track circuit section of the rail. A block diagram related to a series of track circuits, (b) is a block diagram related to one track circuit transmitter/receiver. (a) is an example of the waveform of a track circuit signal when there is no switching of the driving direction, and (b) is an example of the waveform of the track circuit signal that includes an instruction to operate the connection destination exchange means in response to the switching of the driving direction. (a) is an example of the waveform of a track circuit signal when there is no switching of the driving direction, and (b) is an example of the waveform of the track circuit signal that includes an instruction to operate the connection destination exchange means in response to the switching of the driving direction.

Specific embodiments for implementing the track circuit transmitter/receiver and track circuit receiver of the present invention will be explained with reference to Examples 1 to 4 below.
Embodiment 1 shown in FIGS. 1 to 4 embodies the above-mentioned solution means 1 to 3, 6, and 7 (claims 1 to 3, 6, and 7 as originally filed), and FIGS. The illustrated embodiment 2 embodies the above-mentioned solution means 4 to 6 and 8 (claims 4 to 6 and 8 originally filed), and the embodiment 3 shown in FIG. 8 embodies the above-mentioned solution means. Example 4 shown in FIGS. 9 to 11 embodies Solution Means 10 to 12 (Claims 10 to 12 as originally filed) described above. It is something.

Note that when illustrating these, block diagrams and signal waveform diagrams are often used for the sake of clarity.
In addition, in the description of each embodiment, the front or front stage refers to the same direction as the train traveling direction or the direction opposite to the transmission direction of the track circuit signal, and the rear or rear stage refers to the direction opposite to the train traveling direction. It also points in the same direction as the track circuit signal transmission direction.

EMBODIMENT OF THE INVENTION Regarding Example 1 of a track circuit transmitter/receiver and a track circuit receiver of the present invention, the specific configuration thereof will be described with reference to the drawings.

FIG. 1(a) shows a series of track circuits 10, . This is a block diagram, and FIG. 3(b) shows a track circuit transmission/reception system consisting of a receiving section 12 built into the preceding track circuit 10k and a transmitting section 11 built into the succeeding track circuit 10k+1. 2 is a block diagram of machines 11 & 12. FIG.
Further, FIG. 2 shows waveform examples of track circuit signals 30 ₁ to 30 ₅ flowing to the rails 2 of track circuits 10 ₁ to 10 ₅ among a series of track circuits. Further, FIG. 3 is a time chart showing the signal transmission states of these track circuit signals 30 ₁ to 30 ₅ .

The rail 2 to which the track circuit transmitter/receiver 11 & 12 is attached (see Fig. 1(a)) usually consists of a pair of rails running in parallel, but by dividing it into sections of about 1 km, for example, a series of track circuit sections can be created. configured. When the track circuit signal 30 is transmitted in each track circuit section, the leakage current 20 of the track circuit signal (30k+1 in Fig. 1) flows into the adjacent (especially the previous stage) track circuit section, causing the track circuit signal to be transmitted. (30k in FIG. 1), rail insulation 2a is inserted at each track circuit boundary to prevent leakage current 20 from being superimposed. The track circuit transmitter/receiver 11 & 12 is attached to such an insulated track circuit, and by analyzing the track circuit signal 30, it can perform general train detection functions and control the intermediate signal 7 (multi-display colored light signal). In addition to the above, the system also detects the presence or absence of breakdown of the rail insulation 2a.

The track circuit 10 is a combination of a rail 2, a transmitter 11, and a receiver 12 (see FIG. 1(a)), and both the transmitter 11 and the receiver 12 are attached to the rail 2. At that time, it is connected to the rail 2 near the insulation 2a, which is a portion of the track circuit section near the track circuit boundary, so that track circuit signals can be transmitted to each other. Moreover, in this case, in accordance with the prior art, in each track circuit section, the transmitter 11 is connected to the front part closer to the track circuit boundary, and the receiver 12 is connected to the rear part closer to the track circuit boundary. , a series of track circuits 10n (n=1, 2,..., k,...) are constructed, and track circuit signals 30n (n=1, 2,..., k,...) are transmitted via the rails 2 of each section. Become what is communicated.

In addition, the track circuit transmitter/receiver 11 & 12 which also embodies the present invention (see FIG. 1(b)) is a track circuit section before the insulation 2a at the track circuit boundary (the first track circuit section of Solution 1 etc.). The receiver 12 is connected to the rail 2 of the track circuit (corresponding to Connected to the rail 2 of the track circuit section after the insulation 2a (corresponding to the second track circuit section of Solution 1 etc.), the track circuit signal 30 (second track circuit signal, track circuit signal 30k in FIG. 1(b) +1).

Then, an undesired leakage current 20 leaked from the track circuit signal 30k+1 (second track circuit signal) in the subsequent track circuit section to the track circuit signal 30k (first track circuit signal) in the previous track circuit section. Sometimes, based on the deformation of the track circuit signal 30k (first track circuit signal), a dielectric breakdown state of the insulation 2a at the boundary between the preceding and succeeding track circuit sections is detected. Moreover, since this requires cooperation between the reception section 12 at the front stage and the transmission section 11 at the rear stage, when the reception section 12 at the front stage receives the first track circuit signal from the first track circuit section, it is transmitted to the rear stage via the cross-border transmission means 17. Information based on the first track circuit signal is transmitted to the transmitting section 11 of.

The configuration of each part will be explained in detail below.
First, a cross-border transmission means 17 consisting of a data transmission cable, its driving circuit, etc. is provided between the transmitting section 11 and the receiving section 12 of the track circuit transmitter/receiver 11 & 12 (see Fig. 1). Transmission information 18k, which includes order information such as the number of track circuit sections counted backward from the track circuit section in question, is sent via the cross-border transmission means 17 to the reception unit 12 in the previous stage (connected to the first track circuit section). The information is transmitted from the receiving section (the receiving section connected to the second track circuit section) to the transmitting section 11 (the receiving section connected to the second track circuit section) at the subsequent stage.

The transmitter 11 includes a track circuit profile table that holds track circuit signal generation information that contributes to the generation of the n-th track circuit signal 30n (n=k+1 in FIG. 1(b)) corresponding to each piece of order information; A waveform generation section that generates a track circuit signal (track circuit signal 30k+1 in FIG. 1(b)) with an appropriate waveform based on the corresponding generation information is provided. Then, the above-mentioned track circuit profile table is searched using the transmission information 18k obtained via the cross-border transmission means 17, and the track circuit signal 30k+1 is generated based on the generated information obtained thereby, and it is sent to the connection destination. It is configured to transmit to the rail 2 of the track circuit section (relatively backward track circuit section).

The receiving unit 12 uses a track circuit profile table that holds track circuit signal generation information similar to that described above, and searches the track circuit profile table to find the track circuit section to which it is connected (relatively forward track circuit section). A waveform analysis unit that analyzes the track circuit signal received from the rail 2 (track circuit signal 30k in FIG. 1(b)), a lamp control table that holds information accessed when controlling the intermediate signal 7, and a reference device control table that holds information that is accessed when controlling the intermediate signal 7. and a processing section 16 that performs appropriate lighting control for the intermediate traffic light 7. Then, the waveform analysis section creates transmission information 18k including the order information etc., and transmits it to the transmission section 11 via the cross-border transmission means 17, and also uses the order information etc. to issue the traffic light control instruction 14. By creating a signal and sending it to the intermediate traffic light 7 of the corresponding location, the lighting control of the intermediate traffic light 7, etc. is performed.

The determining means determines the breakdown state of the insulation 2a at the track circuit boundary between the preceding track circuit 10k and the subsequent track circuit 10k+1 based on the receiving state of the track circuit signal 30k (first track circuit signal). Although it may be provided as a separate unit from the transmitting section 11 and the receiving section 12, in the illustrated example, it is installed in the processing section 16 of the receiving section 12 by adding a program or the like.
When making this determination, it is assumed that the no-signal period during which no signal is sent is ensured during or after the track circuit signal 30k (first track circuit signal), and that a signal equivalent to dielectric breakdown occurs during that no-signal period. The presence or absence of dielectric breakdown is determined depending on whether or not it has occurred.

Furthermore, it is also possible to find out when there is no signal by referring to the track circuit profile table.
The track circuit signal generation information in the track circuit profile table of the receiving unit 12 and the transmitting unit 11 includes the signal transmission period T, the information propagation period Ta and the no-signal period Tb within the period T, as information related to the track circuit signal 30k. (See FIG. 2 for waveform examples where k is 1 to 5), time difference Tc (k is 1 (See FIG. 3 for example waveforms of 5 to 5) are held.

In this example (see FIG. 2), the period T is divided into the first half of the information propagation period Ta and the second half of the no-signal period Tb, and a one-period sine wave is adopted as the basic waveform 70.
In the frame 50 of one message with period T, the number of basic waveforms 70 consecutively included in the information propagation time Ta indicates the number of track circuits backward from track circuit ₁₀₀ in which the train is located. During the no-signal period Tb after the information propagation period Ta, not only the basic waveform 70 but also any signal exceeding the noise level or amplitude is not transmitted. Also (see FIG. 3), the period T and information propagation time Ta (second transmission time) of the track circuit signal 30k+1 are different from the period T and information propagation time Ta (transmission time of the first track circuit signal) of the track circuit signal 30k. The transmission timing of the track circuit signal is also delayed by a time difference Tc (predetermined time difference).

Since it can be seen from the track circuit profile table that the no-signal period Tb is secured in the latter half of the track circuit signal 30k (first track circuit signal), the receiving section 12 (first receiving section) of the track circuit 10k The determination means incorporated in the track circuit 10k is capable of determining the no-signal period Tb without communicating with the transmitter 11 (first transmitter, other transmitters) of the track circuit 10k.
In addition, the signal equivalent to dielectric breakdown that may occur during the no-signal period Tb is, in short, a signal that exceeds the no-signal, and specifically, a signal that exceeds the noise level and amplitude as described above. As a detection method, the detection method related to the signal at the information propagation time Ta, for example, the method of determining by comparing the magnitude of the amplitude value and the threshold value, may be used as is, but another threshold value smaller than the threshold value may be used as is. By using this method, dielectric breakdown can be easily detected at a premonitory stage.

Further, when the determining means determines that dielectric breakdown has occurred in the insulation 2a at the track circuit boundary between the track circuit 10k and the track circuit 10k+1 based on the track circuit signal 30k received by the receiving unit 12, for example, Refrain from sending the next track circuit signal 30k+1 (second track circuit signal) to the transmitting unit 11 of the track circuit 10k+1 by using the cross-border transmission means 17 of the receiving unit 12 to which the circuit 10k is installed. It is also now required to do so.

Furthermore, upon receiving the request, the transmitter 11 is configured not to transmit the next track circuit signal 30k+1 (second track circuit signal).
Furthermore, when the receiving unit 12 receives the next track circuit signal 30k (first track circuit signal), the determining means must detect a signal equivalent to dielectric breakdown in the no-signal period Tb for the current track circuit signal 30k. For example, it is determined that dielectric breakdown has occurred in the insulation 2a at the track circuit boundary between the track circuit 10k and the track circuit 10k+1.

The manner of use and operation of the track circuit transmitter/receiver 11 & 12 of the first embodiment will be explained with reference to the drawings.

FIG. 1(a) is a block diagram of a series of track circuits 10, .
Further, FIG. 3 is a time chart showing the signal transmission state of the track circuit signals 30 ₁ to 30 ₅ flowing to the rails 2 of the track circuits 10 ₁ to 10 ₅ among the series of track circuits.
Further, FIGS. 4A and 4B are waveform diagrams that reflect the presence or absence of dielectric breakdown, and show waveform examples of the track circuit signal ₃₀₅ .

When the above-mentioned track circuit transmitter/receiver 11 & 12 is connected to each insulation point in an insulated track circuit in which the rail insulation 2a is inserted into the rail 2 to separate the track circuit boundaries, the track circuit signals are used to insulate the track circuit boundaries. The following circuit will be created that can detect even destruction.
In other words (see FIG. 1(a)), in the insulated track circuit, the transmitter 11 and receiver 12 connected to the same track circuit section (10k) transmit and receive the track circuit signal 30k, and also The transmission information 18k related to the position is transmitted from the reception unit 12 of the previous track circuit section (10k) of the preceding and following track circuit sections (10k, 10k+1) to the later track circuit section (10k+1) of the preceding and following track circuit sections. ), and the track circuit signal 30k+1 is transmitted from the transmitter 11 of the later track circuit section (10k+1) with a delay of time difference Tc, and the signal component of the information propagation time Ta of the track circuit signal 30k+1 If the signal is mixed into the no-signal period Tb of the track circuit signal 30k of the previous track circuit section, this will be detected by the determining means of the receiving section 12.

To explain specifically with reference to the waveform example related to the track circuit signal ₃₀₅ in FIG. 4(a), this is a case where the information propagation time Ta and the time difference Tc are the same and the no-signal time Tb is shorter than the information propagation time Ta. In this example, when there is no breakdown in the insulation 2a (see the frame with period T on the left), order information consisting of five sine waves indicating that a train is on the track circuit section five previous tracks is provided. appears at the information propagation time Ta, and the no-signal time Tb becomes a no-signal state.
Then, the normal state of the insulation 2a is confirmed based on the detection of the no-signal state, and the lighting control of the intermediate signal 7 is performed accurately based on the order information.

On the other hand, when the insulation 2a is destroyed (see the frame with the period T in the center), the signal corresponding to the insulation breakdown due to the leakage current 20 of the adjacent track circuit signal ₃₀₆ is delayed by the time difference Tc (=Ta) and Since it is mixed into the circuit signal ₃₀₅ , a signal equivalent to dielectric breakdown appears in the track circuit signal ₃₀₅ from the no-signal period Tb until a little later.
Then, since this is detected by the determination means, the breakdown of the insulation 2a at the section boundary between the track circuit ₁₀₅ and the track circuit ₁₀₆ becomes obvious.

Furthermore, after the dielectric breakdown is detected (see the frame with period T on the right), the transmission of the adjacent track circuit signal ₃₀₆ is temporarily stopped, and the leakage current 20 does not circulate around the transmitter 11. The sent track circuit signal ₃₀₅ is detected by the receiver 12. If the cause of the appearance of a signal equivalent to dielectric breakdown is the wrap-around of the leakage current 20, the signal corresponding to dielectric breakdown will appear or disappear depending on whether or not the adjacent track circuit signal ₃₀₆ is transmitted, whereas other causes. Therefore, if a signal equivalent to dielectric breakdown does not appear when transmission of the adjacent track circuit signal _30-6 is stopped, breakdown occurs in the insulation 2a at the section boundary between the track circuit _10-5 and the track circuit _10-6 . It is confirmed that it was.

An example of the waveform related to the track circuit signal ₃₀₅ in FIG. 4(b) will also be explained. This is a slightly modified frame configuration of the track circuit signal ₃₀₅ in FIG. 4(b) described above. The information propagation time Ta, the no-signal time Tb, and the time difference Tc are set so that the relational expression [Ta<Tc<Tb] holds true. Therefore, even if a signal equivalent to dielectric breakdown due to the leakage current 20 of the adjacent track circuit signal _30-6 appears in the track circuit signal _30-5 (see the frame with period T in the center), the entire portion where it occurs occurs during the no-signal period. Since it is within Tb, the waveform of the information propagation time Ta is not disturbed or broken. Therefore, even if breakdown occurs in the insulation 2a, until the breakdown becomes severe enough to impair the transmission of the track circuit signal ₃₀₆ in the adjacent track circuit section, the track circuit 1 It is also possible to continue using .

Regarding Example 2 of the track circuit transceiver and track circuit receiver of the present invention, the specific configuration thereof will be described with reference to the drawings.
FIG. 5 is a waveform example of the track circuit signals 30 ₁ to 30 ₅ , . _. . , 30 ₉ flowing to the rails 2 of the track circuits 10 ₁ to 10 ₅ , .
Further, FIG. 6 is a time chart showing the signal transmission state of these track circuit signals 30 ₁ to 30 ₅ .

Furthermore, FIG. 7 shows that (a) is transmitted by the transmitter 11 of the track circuit 10 ₄ to the track circuit section of the preceding track circuit 10 ₄ among the two adjacent track circuit sections (10 ₄ , 10 ₅ ). (b) is a waveform example of the signal (30 ₄ ) transmitted by the track circuit 10 5 to the track circuit section of the latter track circuit 10 _{5 of} the above two track circuit sections (10 ₄ , 10 ₅ ). (c) is an example of the waveform of the track circuit signal 30 ₄ received by the receiver 12 of the track circuit 10 ₄ in the preceding track circuit section (10 _{4 )} . .

The track circuit transmitter/receiver 11 & 12 whose signal waveforms are illustrated in FIGS. 5 to 7 are different from those of the first embodiment described above in the waveform of the track circuit signal 30 and the determination method of the determination means.
In _each of the track circuit signals 30 (see FIG. ₅ ), the information propagation period Ta is subdivided into a cycle start waveform period Taa, a no-signal period _Tab , and an information containing period Tac. , a no-signal period Tab is ensured not only at the tail end (Tb) of the track circuit signal 30 but also in the middle of the track circuit signal 30.

Further, in the orbital circuit signal 30, a cycle start waveform 71, which is a series of a plurality of basic waveforms 70, is arranged at a cycle start waveform time Taa that occupies the beginning of the cycle T. Moreover, only one basic waveform 70 is included in the information containing time Tac of the track circuit signal 30, and the above-mentioned transmission information 18k (order information) is determined by the position of the basic waveform 70 in the information containing time Tac. It has become. A no-signal period Tb is also secured after the information propagation period Ta, and this no-signal period Tb is used to prevent the connection between the basic waveform 70 of the information containing period Tac and the period start waveform 71 of the subsequent track circuit signal 30. Since it is for avoidance (see Figure 6), it can be short.

Further (see FIG. 6), there is a relationship between this no-signal period Tab, the above-mentioned time difference Tc, and the cycle start waveform period Taa, which is the time from the beginning of the track circuit signal 30 to the beginning of the no-signal period Tab. The formula [Taa<Tc<Tab] also holds true. Since the cycle start waveform timing Taa is much shorter than the cycle T, the time difference Tc can also be shortened, so even if the track circuit signal 30 is transmitted in multiple stages, the delay time of information transmission can be kept small. Moreover, this track circuit signal 30 is obtained by superimposing the track circuit signal 30k+1 (second track circuit signal) in the former stage on the track circuit signal 30k+1 (second track circuit signal) in the former stage with a time difference Tc. Both the cycle start waveform 71 and the basic waveform 70 of both signals 30k and 30k+1 continue to exist without being destroyed.

Therefore, the determination means checks the presence or absence of the cycle start waveform 71 in the track circuit signal 30k (first track circuit signal), and determines that breakdown of the insulation 2a has occurred when two or more are detected. However, the presence or absence of the cycle start waveform 71 is checked for the no-signal period Tab of the track circuit signal 30k (first track circuit signal), and if even one is detected, it is determined that breakdown of the insulation 2a has occurred. Even if it is, check whether there is a signal exceeding the no signal for the no-signal period Tab of the track circuit signal 30k (first track circuit signal), and if even one is detected, breakdown of the insulation 2a has occurred. Even if it is determined that this is the case, dielectric breakdown at the track circuit boundary can be accurately detected even if any one of these determination methods is used in combination.

FIG. 8 shows an example of a signal waveform that is less affected by dielectric breakdown. (a) shows a typical example of a signal waveform that can be understood intuitively, and (b) to (d) are examples of signal waveforms that are less affected by dielectric breakdown. The procedure for creating an example signal waveform from a desired initial waveform is shown.

As mentioned above, the relational expression [Taa<Tc<Tab] holds true for the track circuit signal 30 shown in FIG. 5 and the track circuit signal 30 obtained by delaying it by the time difference Tc. If we impose the condition of the relational expression [Taa=Tac] and also impose the condition that the set of information-containing period Tac and no-signal period Tab is repeated within the period T, the track circuit signal 30 becomes (Fig. 8 (see (a)), the track circuit signal will have a signal waveform that is less affected by dielectric breakdown. Specifically, even if the second track circuit signal is mixed into the first track circuit signal due to dielectric breakdown at the track circuit boundary, the second track circuit signal can be easily detected by removing the value of the no-signal period Tb from the first track circuit signal. It is possible to reproduce the first track circuit signal without mixing the second track circuit signal.

To explain in more detail with reference to the time chart of FIG. 8(a), the track circuit signal 30k (first track circuit signal) and the track circuit signal 30k+1 (second track circuit signal) delayed by the time difference Tc. , a false logical value is assigned to the no-signal period Tab, and a true logical value is assigned to the other periods, such as the cycle start waveform period Taa and the information-containing period Tac (see Fig. 8(a)). (see the two time charts), and if we take the logical product for each corresponding period (see the bottom time chart in Figure 8(a)), we establish a relationship in which the logical value is false for all periods. do. When such a relationship is established, it is intuitively recognized that appropriate information can be obtained from the track circuit signal 30k by simply ignoring the value of the no-signal period Tab.

In addition, in the case of a so-called desired track circuit signal 30 whose signal format (telegram format) is freely created, the no-signal period Tab contains the track circuit signal 30k and the track circuit signal 30k+1 delayed by the time difference Tc. If a false logical value is assigned, a true logical value is assigned to the other periods Taa and Tac, and a logical product is taken for each corresponding period, a relationship is established in which the logical value is false in all periods. However, even from such a track circuit signal 30, it is possible to create a track circuit signal 30 that satisfies the above conditions and is close to the desired one.

Specifically (see Fig. 8(b) to (d)), a true/false logic value is applied to the desired track circuit signal, and then the signal delayed by the time difference Tc is arranged (Fig. 8(b) )reference). Then, search along the time axis for an overlapping part where both signals are true, and once you find it (the part marked with two thin vertical lines in the figure), divide the overlapping part into two at an appropriate ratio and make both signals true. Either allocate it to the signal (in the diagram, it is divided at the vertical two-dot chain line), or target only one signal (not shown), and delete the overlapping part (from (b) to (c) in Figure 8). ). In this way, a signal format with reduced overlap is created, so by repeating the process (see the thin dot-dash line from (c) to (d) in FIG. 8), a track circuit signal 30 close to the desired one is created.

Regarding Example 4 of the track circuit transceiver and track circuit receiver of the present invention, the specific configuration thereof will be described with reference to the drawings.
FIG. 9 shows the structure of a track circuit transmitter/receiver and a track circuit receiver suitable for a single-track track, in which (a) shows a transmitter 11 and a receiver 12 for each track circuit section in which a single-track rail 2 is divided by insulation 2a. It is a block diagram related to a series of track circuits 90, ..., 90 configured by attaching the above, and (b) is a block diagram of the track circuits that are divided into adjacent track circuit sections with the insulation 2a in between. It is a block diagram concerning circuit transceiver 11&12.

In addition, in FIG. 10, (a) is an example of the waveform of the track circuit signal ₃₀₅ when there is no switching of the driving direction, and (b) is a track circuit including an instruction to operate the connection exchange means in response to the switching of the driving direction. This is an example of waveforms related to a signal ₃₀₅ and a rear track circuit signal ₃₀₆ .
Further, in FIG. 11, (a) shows an example of the waveform of the track circuit signal ₃₀₅ when there is no switching of the driving direction, and (b) shows a track circuit including an instruction to operate the connected exchange means in response to the switching of the driving direction. This is an example of waveforms related to a signal ₃₀₅ and a rear track circuit signal ₃₀₆ .

This track circuit transmitter/receiver and track circuit receiver are different from those of Embodiments 1 to 3 described above in that the rail 2 to which the track circuit transmitter/receiver 11 & 12 is attached is neither upbound nor downhill, and the train is time-divided. The two points are that the train is a single track that runs in both directions, and that the track circuit transmitter/receiver 11 & 12 has been modified to become a track circuit transmitter/receiver 90 to accommodate switching of the direction of train travel (see Figure 9). ).

In the single track section (see FIG. 9(a)), an intermediate signal 7 capable of handling both up and down traffic is adopted, and a single track automatic blocker 4a is installed for exclusive control of up and down traffic. In the single-track automatic blocker 4a, blocker station processing sections 4b are installed at both section ends, and both blocker station processing sections 4b, 4b are connected by a driving direction line 4c, and the operating direction of the blocker station processing section 4b is connected to the blocker station processing section 4b. The driving direction of the train 1 can be switched by operating the lever 4d.

When the driving direction is switched in such a single-track automatic block, the relationship between transmission and reception of the track circuit is reversed, and a stop signal is output to the traffic signal in the opposite direction, and the traffic signal in the forward direction is In this case, it is necessary to switch to output a signal indication determined from the position of the train ahead.
Therefore (see FIG. 9(b)), the track circuit transmitter/receiver 90 has a switching contact 15 (connection destination exchange means) for switching the connection destination of the transmitter 11 to one or the other of the rails 2 on both sides of the insulation 2a. , a switching contact 15 (connection destination switching means) for switching the connection destination of the receiving section 12 to one of the rails 2 on both sides of the insulation 2a.

Moreover, these switching contacts 15, 15 are configured to switch according to the transmission/reception switching instruction 13 issued by the processing section 16.
Further (see FIG. 9(b)), in the configuration of this embodiment, the processing section 16 is separated from the transmitting section 11 and becomes an individual unit.
Furthermore, in this configuration example, the cross-border transmission means 17 has a processing section 16 interposed therebetween. Specifically (see FIG. 9(b)), a cross-border transmission means 17a transmits necessary information from the transmitting section 11 to the processing section 16, and a cross-border transmission means 17b transmits necessary information from the processing section 16 to the receiving section 12. The cross-border transmission means 17 is divided into two parts.

Furthermore, when switching the running direction of a train, the track circuit transmitter/receiver 90 located outside the in-house signal 6 of the previous arrival station (on the right side in the figure) takes in the conditions of the running direction lever 4d and switches the running direction. If this occurs, the information is added to the track circuit signal 30 and transmitted.
Then, the processing is sequentially transmitted to the track circuit inside the departure signal at the departure station (left side in the figure), so that the transmission and reception of the track circuit and the control of the signal 7 are all switched in response to the switching of the driving direction. It has become.

Therefore, the track circuit transmitter/receiver 90 located near the in-house signal 6 always receives the switching conditions of the driving direction lever 4d from the block device station processing section 4b of one of the single-track automatic blockers 4a, and the switching conditions of the driving direction lever 4d are always inputted. In this case, the track circuit signal 30 to which the operating direction switching instruction wave (operation instruction for the connection exchange means) is added is transmitted to the next stage track circuit, and the connection destination between the transmitter 12 and the receiver 11 of the own machine 90 is transmitted. Furthermore, a signal switching command is transmitted to the corresponding traffic lights 6 and 8 in accordance with the driving direction.

Regarding the track circuit transmitter/receiver 90 located between the stations, whether or not a driving direction switching instruction wave (operation instruction for the connected exchange means) is added to the track circuit signal 30 received from the previous track circuit transmitter/receiver 90. If it has been added, the track circuit signal 30 to which the driving direction switching instruction wave (operation instruction for the connecting exchange means) is added is similarly transmitted to the next stage track circuit, and the own machine 90 transmits the signal. The section 11 and the receiving section 12 are switched, and furthermore, a signal switching command corresponding to the driving direction is transmitted to the corresponding intermediate signal 7.

When such processing of the transceiver 90 (switching operation of the switching contacts 15, 15, etc.) is performed one after another to the track circuit 90 inside the departure signal 8 of the adjacent station, a driving direction switching instruction wave is generated. From the track circuit transmitter/receiver 90 that received the instruction to operate the connection destination exchange means, the driving direction switching instruction is transmitted to the other block device station processing section 4b of the single track automatic block device 4a. As a result, the connection destinations of the transmitter 11 and the receiver 12 of the track circuit transmitter/receiver 90 between the stations are all switched, and as a result, the transmission and reception directions of the track circuits are all reversed, and the signals between stations are also changed to the operating direction. You can also switch between up and down.

Here, two specific examples will be given in which the driving direction switching instruction wave 75 is included in the track circuit signal 30 (see FIG. 5) having the period start waveform 71 described above. In either case, a waveform that can be easily distinguished from the cycle start waveform 71 is adopted as the driving direction switching instruction wave 75.
In the first waveform example (see FIG. 10), the driving direction switching instruction wave 75 is included at the end of the cycle start waveform timing Taa. On the other hand, in the second waveform example (see FIG. 11), the driving direction switching instruction wave 75 is included at the beginning of the information containing time Tac.

In both waveform examples, since the driving direction switching instruction wave 75 is located a fixed number of waves behind the cycle start waveform 71, the presence or absence of the driving direction switching instruction wave 75 can be easily and accurately determined. .
Furthermore, in the first waveform example (see FIG. 10), the time difference Tc becomes longer as the cycle start waveform timing Taa increases, but the driving direction switching instruction wave 75 is destroyed by the superposition of the track circuit signal ₃₀₆ in the latter stage. It has the characteristic that there is no need to consider it because there is no need to consider it.
On the other hand, the second waveform example (see FIG. 11) shows that if the destruction of the driving direction switching instruction wave 75 due to the superposition of the track circuit signal ₃₀₆ in the latter stage can be avoided, the time difference Tc can be kept short. It has the ability to be done.

Furthermore (see FIGS. 10 and 11), regarding the timing at which the processing unit 16 issues the transmission/reception switching instruction 13 to the switching contacts 15, 15, the receiving unit 12 determines the timing of the operation included in the track circuit signal ₃₀₅ of the preceding track circuit section. When the direction switching instruction wave 75 is received, the transmission/reception switching instruction 13 is not immediately issued, but is delayed. Specifically, the transmitting unit 11 transmits the track circuit signal ₃₀₆ to the subsequent track circuit section with a time difference Tc delay, and after the period T has passed and the transmission by the transmitting unit 11 is completed, the transmitting unit 11 transmits the track circuit signal 306 to the subsequent track circuit section. The switching contacts 15, ₁₅ are performed in response to the driving direction switching instruction wave 75 of the track circuit signal 305. Therefore, not only the track circuit signal ₃₀₅ at the front stage but also the track circuit signal ₃₀₆ at the rear stage is accurately transmitted.

[others]
In FIGS. 5, 6, 7, 10, and 11 according to the above embodiments 2 to 4, there is only one basic waveform 70 as an information carrier included in the information containing time Tac, but the cycle start waveform 71 and the driving direction switching A plurality of basic waveforms 70 may be included in the information containing time Tac as long as they can be separated from the instruction wave 75. Further, although the length of the track circuit signal 30 is a fixed length, this is not essential either, and may be a variable length as long as information transmission over a series of track circuits is not impaired.

In the above embodiment, a sine wave was used as the basic waveform 70 and other waveforms 71 and 75 of the track circuit signal, but the waveform of the track circuit signal is not limited to a sine wave, but may be a rectangular wave. It may also be a high-frequency carrier wave modulated by AM or FM modulation; in short, it may be anything that can transmit the presence or absence of a signal and its content. The wave numbers of the cycle start waveform 71 and the driving direction switching instruction wave 75 may be any number as long as it is appropriate for the purpose.

The track circuit transmitter/receiver and track circuit receiver of the present invention are not limited to application to one side of the above-mentioned single track or double track, but can be applied to both sides of a double track or any rail of a double track by installing multiple tracks in parallel. It can also be applied to

1...Train, 2...Rail (rail pair), 2a...Insulation (track circuit section boundary),
4a...Single track automatic blocker, 4b...Blocker station processing section,
4c...Driving direction line, 4d...Driving direction lever,
6... In-house signal, 7... Intermediate signal (multi-display colored light signal), 8... Departure signal,
10...orbit circuit,
11&12...orbit circuit transmitter/receiver,
11... Transmitting section, 12... Receiving section, 13... Transmission/reception switching instruction,
14...Traffic light control instruction, 15...Switching contact, 16...Processing unit,
17... Cross-border transmission means, 18k... Transmission information (order information), 20... Leakage current,
30...orbit circuit signal,
30n...n-th orbital circuit signal (n=1, 2,..., k,...),
50...Frame, 51...Offset time (predetermined time difference),
70...Basic waveform, 71...Cycle start waveform, 75...Driving direction switching instruction wave,
90...orbit circuit transmitter/receiver,
T...Period, Ta...Information propagation time, Tb...No signal time (after), Tc...Time difference,
Taa...cycle start waveform time, Tab...no signal time (in the middle), Tac...information containing time

Claims (12)

a receiving section connected to a portion of the first track circuit section closer to the track circuit boundary when the first track circuit section, the track circuit boundary, and the second track circuit section are connected to an insulated track circuit; A track circuit transceiver comprising: a transmitter connected to a portion of the second track circuit section near the track circuit boundary when installed on the insulated track circuit ;
Cross-border transmission means capable of transmitting information from the reception section to the transmission section is provided, and when the reception section receives the first track circuit signal from the first track circuit section, the transmission section transmits the information via the cross-border transmission means. The transmission section is configured to transmit information based on the first track circuit signal to the section, and the transmission section transmits a second track circuit signal to the second track circuit section in accordance with the transmitted information. , a predetermined time difference is ensured between the transmission time of the first track circuit signal and the transmission time of the second track circuit signal, and the first track circuit signal is transmitted either during or after the transmission time. Alternatively, assuming that a no-signal period in which no signal is transmitted is ensured on both sides, determining means is provided for determining the dielectric breakdown state of the track circuit boundary based on the receiving state of the first track circuit signal during the no-signal period. A track circuit transceiver characterized by: In a track circuit receiver that is connected to a portion of the first track circuit section closer to the track circuit boundary when installed on an insulated track circuit in which a first track circuit section, a track circuit boundary, and a second track circuit section are connected,
When the first track circuit signal is received from the first track circuit section, the information is transmitted to a transmitting section connected to a portion of the second track circuit section near the track circuit boundary when installed on the insulated track circuit. Information based on the first track circuit signal is transmitted to the transmitting unit via the cross-border transmission means, and there is a no-signal period in which no signal is sent either during or after the first track circuit signal. A track circuit receiver, characterized in that the dielectric breakdown state of the track circuit boundary is determined based on the reception state of the first track circuit signal during the no-signal period, assuming that the first track circuit signal is secured. 2. The track according to claim 1, wherein the transmitter is configured to ensure a no-signal period in which no signal is transmitted during or after the second track circuit signal. circuit transceiver. When the determining means detects the cycle start waveform during the no-signal period, assuming that the first track circuit signal includes a cycle start waveform that can identify the start of transmission of the first track circuit signal. The track circuit transceiver according to claim 1 or 3, wherein the track circuit transceiver is configured to determine that dielectric breakdown has occurred. a receiving section connected to a portion of the first track circuit section closer to the track circuit boundary when the first track circuit section, the track circuit boundary, and the second track circuit section are connected to an insulated track circuit; A track circuit transceiver comprising: a transmitter connected to a portion of the second track circuit section near the track circuit boundary when installed on the insulated track circuit;
Cross-border transmission means capable of transmitting information from the reception section to the transmission section is provided, and when the reception section receives the first track circuit signal from the first track circuit section, the transmission section transmits the information via the cross-border transmission means. The transmission section is configured to transmit information based on the first track circuit signal to the section, and the transmission section transmits a second track circuit signal to the second track circuit section in accordance with the transmitted information. , both the first track circuit signal and the second track circuit signal include a cycle start waveform that can specify the start of transmission, and the transmission timing of the first track circuit signal and the second track circuit signal are A predetermined time difference is ensured between the transmission timing of the circuit signal, and if the second track circuit signal is superimposed on the first track circuit signal with a shift of the time difference, the cycle start waveforms of both signals are destroyed. A determining means is provided for determining that dielectric breakdown has occurred when a plurality of the period start waveforms are detected in the first track circuit signal as a signal that continues to remain without any damage. Features a track circuit transceiver. The determining means is configured to determine that dielectric breakdown has occurred when a signal exceeding a no signal is detected during the no signal period regarding the receiving state of the first track circuit signal. The track circuit transceiver according to claim 1 or claim 3. When the receiving section receives the first track circuit signal following the first track circuit signal after the determining means determines that dielectric breakdown has occurred, the transmitting section receives the first track circuit signal next to the second track circuit signal. The determination means is configured to refrain from transmitting the second track circuit signal, and if no dielectric breakdown is detected for the next first track circuit signal, the determining means determines that dielectric breakdown has occurred. A track circuit transceiver according to any one of claims 4 to 6. The no-signal period is secured in the middle of the first track circuit signal, the time difference is shorter than the time length of the no-signal period, and the time is from the start of the first track circuit signal to the start of the no-signal period. A track circuit transceiver according to any one of claims 1, 3, 4 and 6, characterized in that the track circuit transceiver is longer. Regarding the first track circuit signal and the second track circuit signal delayed by the time difference, a false logical value is assigned to a portion of the no-signal period, and a true logical value is assigned to a portion of the other period. 9. The track circuit transmitter/receiver according to claim 8, wherein when a logical product is calculated for each corresponding time period, a relationship is established such that the logical value is false at all times. The trajectory according to claim 1 or any one of claims 3 to 9, further comprising connection destination exchanging means for exchanging a connection destination of the receiving section and a connection destination of the transmitting section. circuit transceiver. 11. The connecting point exchanging means according to claim 10, wherein when the receiving section receives the first track circuit signal including an instruction to operate the connecting point exchanging means, the connecting point exchanging means is activated in response. Orbital circuit transceiver. 2. The connection destination exchange means is configured to delay the connection destination exchange according to the operation instruction from the time when the reception section receives the operation instruction until the transmission by the transmission section is completed. 12. The track circuit transceiver according to 11 .

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